If you have a database of CDs, and artists, etc.
Say you want to get a list of artists with their most recent releases:
SELECT
artist.name,
album.title,
album.release_date
FROM artist
LEFT JOIN
album ON artist.artistID = album.artistID
WHERE album.albumID = (
SELECT MAX(albumID) FROM album WHERE artist.artistID = album.artistID
)
Make sure you have indexed correctly, this could be a slow one.